Hi,
I have a 2004 Mercury 9.9HP 2-stroke motor, which overheated and seized a few minutes into my first trip out of the season yesterday. It started ok this morning, but there wasn't any water (just very hot exhaust) coming out of the water indicator hole. So I pulled the motor off the boat and removed the lower unit and checked the impeller, which was in good shape. I put it all back together, and started it up with a water supply on the flushing attachment. Still no water coming out of the indicator hole, but the pump is definitely pumping - there's lots of water coming out of the hole halfway up the driveshaft housing when the motor revs.
Any suggestions? Perhaps a thermostat? Perhaps a blockage or bad connection between the pump and the water tube? It wasn't clear to me from the service manual which way around the guide that goes between the water pump and the water tube should go, so I may have installed that upside down. Which way around should it go?
Thanks,
James
I have a 2004 Mercury 9.9HP 2-stroke motor, which overheated and seized a few minutes into my first trip out of the season yesterday. It started ok this morning, but there wasn't any water (just very hot exhaust) coming out of the water indicator hole. So I pulled the motor off the boat and removed the lower unit and checked the impeller, which was in good shape. I put it all back together, and started it up with a water supply on the flushing attachment. Still no water coming out of the indicator hole, but the pump is definitely pumping - there's lots of water coming out of the hole halfway up the driveshaft housing when the motor revs.
Any suggestions? Perhaps a thermostat? Perhaps a blockage or bad connection between the pump and the water tube? It wasn't clear to me from the service manual which way around the guide that goes between the water pump and the water tube should go, so I may have installed that upside down. Which way around should it go?
Thanks,
James